package com.jsj.subway.ai.utils;

import cn.hutool.core.util.StrUtil;
import org.springframework.stereotype.Component;
import org.springframework.web.filter.OncePerRequestFilter;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@Component
public class SSEFilter extends OncePerRequestFilter {
    @Override
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
        String sse = request.getHeader("SSE");
        try {
            if (StrUtil.isNotBlank(sse)){
                SSEContextHolder.set(sse);
            }
            filterChain.doFilter(request,response);
        }finally {
            SSEContextHolder.remove();
        }
    }
}
